Study of the urban evolution of Brasilia with the use of LANDSAT data

The urban growth of Brasilia within the last ten years is analyzed with special emphasis on the utilization of remote sensing orbital data and automatic image processing. The urban spatial structure and the monitoring of its temporal changes were focused in a whole and dynamic way by the utilization of MSS-LANDSAT images for June 1973, 1978 and 1983. In order to aid data interpretation, a registration algorithm implemented at the Interactive Multispectral Image Analysis System (IMAGE-100) was utilized aiming at the overlap of multitemporal images. The utilization of suitable digital filters, combined with the images overlap, allowed a rapid identification of areas of possible urban growth and oriented the field work. The results obtained permitted an evaluation of the urban growth of Brasilia, taking as reference the proposed stated for the construction of the city

Magnetic moment of Fe3O4 films with thicknesses near the unit-cell size

CNPQ - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOFAPEMIG - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE MINAS GERAISFAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOCAPES - COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIORWe perform a systematic study on the evolution of the magnetic spin moment (ms) of epitaxial [100]- and [111]-magnetite films of increasing thickness. The ultrathin films are characterized by low-energy electron diffraction, x-ray absorption spectroscopy, and x-ray magnetic circular dichroism (XMCD). By employing sum rules on the XMCD spectra we obtain ms=3.6 μB/f.u. for samples of around 35 Å. This is considered a bulk value and has been reported only for films more than 10 times thicker. Moreover, we show that even 10-Å-thick magnetite already presents a significant magnetic moment. For both grown directions the moment increases similarly with the thickness. The ferromagnetic behavior for each iron ion site (Feocta2+, Feocta3+, Fetetra3+) of Fe3O4 is measured by monitoring XMCD peaks. The deduced hysteresis curves (per ion, per site) exhibit a coercive field of 300 Oe. Our results show that both the ferrimagnetic order and the bulk moment value are preserved at room temperature around the thickness of 2 unit cells.We perform a systematic study on the evolution of the magnetic spin moment (ms) of epitaxial [100]- and [111]-magnetite films of increasing thickness. The ultrathin films are characterized by low-energy electron diffraction, x-ray absorption spectroscopy, and x-ray magnetic circular dichroism (XMCD). By employing sum rules on the XMCD spectra we obtain ms=3.6 μB/f.u. for samples of around 35 Å. This is considered a bulk value and has been reported only for films more than 10 times thicker. Moreover, we show that even 10-Å-thick magnetite already presents a significant magnetic moment. For both grown directions the moment increases similarly with the thickness. The ferromagnetic behavior for each iron ion site (Feocta2+, Feocta3+, Fetetra3+) of Fe3O4 is measured by monitoring XMCD peaks. The deduced hysteresis curves (per ion, per site) exhibit a coercive field of 300 Oe. Our results show that both the ferrimagnetic order and the bulk moment value are preserved at room temperature around the thickness of 2 unit cells.We perform a systematic study on the evolution of the magnetic spin moment (ms) of epitaxial [100]- and [111]-magnetite films of increasing thickness. The ultrathin films are characterized by low-energy electron diffraction, x-ray absorption spectroscopy, and x-ray magnetic circular dichroism (XMCD). By employing sum rules on the XMCD spectra we obtain ms=3.6 μB/f.u. for samples of around 35 Å. This is considered a bulk value and has been reported only for films more than 10 times thicker. Moreover, we show that even 10-Å-thick magnetite already presents a significant magnetic moment. For both grown directions the moment increases similarly with the thickness. The ferromagnetic behavior for each iron ion site (Feocta2+, Feocta3+, Fetetra3+) of Fe3O4 is measured by monitoring XMCD peaks. The deduced hysteresis curves (per ion, per site) exhibit a coercive field of 300 Oe. Our results show that both the ferrimagnetic order and the bulk moment value are preserved at room temperature around the thickness of 2 unit cells.901316CNPQ - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOFAPEMIG - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE MINAS GERAISFAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOCAPES - COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIORCNPQ - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOFAPEMIG - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE MINAS GERAISFAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOCAPES - COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIORSem informaçãoSem informaçãoSem informaçãoSem informaçãoOrna, J., Algarabel, P.A., Morellón, L., Pardo, J.A., De Teresa, J.M., López Antón, R., Bartolomé, F., Wildes, A., (2010) Phys. Rev. B, 81, p. 144420. , PRBMDO 1098-0121Hari Babu, V., Govind, R.K., Schindler, K.-M., Welke, M., Denecke, R., (2013) J. Appl. Phys., 114, p. 113901. , JAPIAU 0021-8979Moussy, J.-B., Gota, S., Bataille, A., Guittet, M.-J., Gautier-Soyer, M., Delille, F., Dieny, B., Snoeck, E., (2004) Phys. Rev. B, 70, p. 174448. , PRBMDO 1098-0121Morrall, P., Schedin, F., Langridge, S., Bland, J., Thomas, M.F., Thornton, G., (2003) J. Appl. Phys., 93, p. 7960. , JAPIAU 0021-8979Liu, W.Q., Xu, Y.B., Wong, P.K.J., Maltby, N.J., Li, S.P., Wang, X.F., Du, J., Zhang, R., (2014) Appl. Phys. Lett., 104, p. 142407. , APPLAB 0003-6951Lu, Y.X., Claydon, J.S., Xu, Y.B., Schofield, D.M., Thompson, S.M., (2004) J. Appl. Phys., 95, p. 7228. , JAPIAU 0021-8979Eerenstein, W., Hibma, T., Celotto, S., (2004) Phys. Rev. B, 70, p. 184404. , PRBMDO 1098-0121Voogt, F.C., Palstra, T.T.M., Niesen, L., Rogojanu, O.C., James, M.A., Hibma, T., (1998) Phys. Rev. B, 57, p. R8107. , PRBMDO 0163-1829Monti, M., Santos, B., Mascaraque, A., Rodríguez De La Fuente, O., Niño, M.A., Mentes, T.O., Locatelli, A., De La Figuera, J., (2012) Phys. Rev. B, 85, p. 020404. , PRBMDO 1098-0121Lu, Y.X., Claydon, J.S., Xu, Y.B., Thompson, S.M., Wilson, K., Van Der Laan, G., (2004) Phys. Rev. B, 70, p. 233304. , PRBMDO 1098-0121Lu, Y.X., Claydon, J.S., Ahmad, E., Xu, Y.B., Ali, M., Hickey, B.J., Thompson, S.M., Wilson, K., (2005) J. Appl. Phys., 97, p. 10C313Schedin, F., Hewitt, L., Morrall, P., Petrov, V.N., Thornton, G., Case, S., Thomas, M.F., Uzdin, V.M., (1998) Phys. Rev. B, 58, p. R11861. , PRBMDO 0163-1829Wong, P.K.J., Zhang, W., Cui, X.G., Xu, Y.B., Wu, J., Tao, Z.K., Li, X., Van Der Laan, G., (2010) Phys. Rev. B, 81, p. 035419. , PRBMDO 1098-0121Goering, E., Gold, S., Lafkioti, M., Schütz, G., (2006) Europhys. Lett., 73, p. 97. , EULEEJ 0295-5075Chen, C.T., Idzerda, Y.U., Lin, H.-J., Smith, N.V., Meigs, G., Chaban, E., Ho, G.H., Sette, F., (1995) Phys. Rev. Lett., 75, p. 152. , PRLTAO 0031-9007Goering, E.J., Lafkioti, M., Gold, S., Schuetz, G., (2007) J. Magn. Magn. Mater., 310, p. e249. , JMMMDC 0304-8853Figueiredo, J.J.S., Basilio, R., Landers, R., Garcia, F., De Siervo, A., (2009) J. Synch. Rad., 16, p. 346. , JSYRES 0909-0495Kallmayer, M., Hild, K., Elmers, H.J., Arora, S.K., Wu, H.-C., Sofin, R.G.S., Shvets, I.V., (2008) J. Appl. Phys., 103, p. 07D715. , JAPIAU 0021-8979Huang, D.J., Chang, C.F., Jeng, H.-T., Guo, G.Y., Lin, H.-J., Wu, W.B., Ku, H.C., Chen, C.T., (2004) Phys. Rev. Lett., 93, p. 077204. , PRLTAO 0031-9007Abreu, G.J.P., Paniago, R., Pfannes, H.-D., (2014) J. Magn. Magn. Mater., 349, p. 235. , JMMMDC 0304-8853Bruns, D., Lindemann, S.R., Kuepper, K., Schemme, T., Wollschläger, J., (2013) Appl. Phys. Lett., 103, p. 052401. , APPLAB 0003-6951Fonin, M., Pentcheva, R., Dedkov, Y.S., Sperlich, M., Vyalikh, D.V., Scheffler, M., Rüdiger, U., Güntherodt, G., (2005) Phys. Rev. B, 72, p. 104436. , PRBMDO 1098-0121Ritter, M., Over, H., Weiss, W., (1997) Surf. Sci., 371, p. 245. , SUSCAS 0039-6028Ritter, M., Ranke, W., Weiss, W., (1998) Phys. Rev. B, 57, p. 7240. , PRBMDO 0163-1829Weiss, W., Ritter, M., (1999) Phys. Rev. B, 59, p. 5201. , PRBMDO 0163-1829The authors thank CNPq, FAPEMIG, FAPESP, and CAPES, Brazilian research agencies, for financial support and the Laboratorio Nacional de Luz Sincrotron for beam time (SGM-10986 and SGM-12716)

Testosterone represses ubiquitin ligases atrogin-1 and Murf-1 expression in an androgen-sensitive rat skeletal muscle in vivo

Pires-Oliveira M, Maragno AL, Parreiras-E-Silva LT, Chiavegatti T, Gomes MD, Godinho RO. Testosterone represses ubiquitin ligases atrogin-1 and Murf-1 expression in an androgen-sensitive rat skeletal muscle in vivo. J Appl Physiol 108: 266-273, 2010. First published November 19, 2009; doi:10.1152/japplphysiol.00490.2009.-Skeletal muscle atrophy induced by denervation and metabolic diseases has been associated with increased ubiquitin ligase expression. in the present study, we evaluate the influence of androgens on muscle ubiquitin ligases atrogin-1/MAFbx/FBXO32 and Murf-1/Trim63 expression and its correlation with maintenance of muscle mass by using the testosterone-dependent fast-twitch levator ani muscle (LA) from normal or castrated adult male Wistar rats. Gene expression was determined by qRT-PCR and/or immunoblotting. Castration induced progressive loss of LA mass (30% of control, 90 days) and an exponential decrease of LA cytoplasm-to-nucleus ratio (nuclear domain; 22% of control after 60 days). Testosterone deprivation induced a 31-fold increase in LA atrogin-1 mRNA and an 18-fold increase in Murf-1 mRNA detected after 2 and 7 days of castration, respectively. Acute (24 h) testosterone administration fully repressed atrogin-1 and Murf-1 mRNA expression to control levels. Atrogin-1 protein was also increased by castration up to 170% after 30 days. Testosterone administration for 7 days restored atrogin-1 protein to control levels. in addition to the well known stimulus of protein synthesis, our results show that testosterone maintains muscle mass by repressing ubiquitin ligases, indicating that inhibition of ubiquitin-proteasome catabolic system is critical for trophic action of androgens in skeletal muscle. Besides, since neither castration nor androgen treatment had any effect on weight or ubiquitin ligases mRNA levels of extensor digitorum longus muscle, a fast-twitch muscle with low androgen sensitivity, our study shows that perineal muscle LA is a suitable in vivo model to evaluate regulation of muscle proteolysis, closely resembling human muscle responsiveness to androgens.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Universidade Federal de São Paulo, Dept Pharmacol, BR-04044020 São Paulo, BrazilUniv São Paulo, Fac Med Ribeirao Preto, Dept Biochem & Immunol, Ribeirao Preto, BrazilUniversidade Federal de São Paulo, Dept Pharmacol, BR-04044020 São Paulo, BrazilFAPESP: 05/59006-1FAPESP: 2006/58629-8Web of Scienc

Mudanças de uso nas áreas agrícolas do Cerrado no período 2016-2020.

Este estudo objetivou analisar as mudanças de uso dessas áreas agrícolas no período 20162020, baseada nos mapas anuais de uso e cobertura de terras do Projeto MapBiomas.Editores: Douglas Francisco Marcolino Gherardi, Ieda Del´Arco Sanches, Luiz Eduardo Oliveira e Cruz de Aragão

Dados multisensor na caracterização do perfil espectral de sistemas de integração lavoura-pecuária em área de Cerrado.

Objetivou-se caracterizar o comportamento espectro-temporal de algumas áreas conduzidas com ILP em Campo Grande, Mato Grosso do Sul, com base no índice de vegetação por diferença normalizada (NDVI) calculado a partir de dados multisensor harmonizados Landsat e Sentinel-2 (HLS) entre 2021 e 2022.Editores: Douglas Francisco Marcolino Gherardi, Ieda Del´Arco Sanches, Luiz Eduardo Oliveira e Cruz de Aragão

Imagens Sentinel - 2A para mapeamento de uso e cobertura da terra em áreas de expansão agrícola no Cerrado.

Considerando os processos de expansão, diversificação e intensificação agrícola, associado a crescente disponibilidade de novos sensores, este estudo objetivou gerar a classificação digital de uso e cobertura das terras no município de Balsas (Maranhão) a partir de imagens do satélite Sentinel - 2 A (MSI - Multispectral Instrument).Evento online. CIIC 2022. Nº 22601

Análise de dados Harmonized Landsat Sentinel para mapeamento de uso e cobertura da terra em área de expansão agrícola no Cerrado.

Este estudo objetivou avaliar se o uso integrado de dados Landsat 8 Operational Land Imager (OLI) e Sentinel-2 Multispectral Instrument (MSI) pode contribuir para o possível aumento da exatidão de classificações digitais de uso e cobertura da terra em região de expansão agrícola no Cerrado.e64865

Uso de dados multi-sensores para o monitoramento agrícola no cerrado: resultados preliminares.

O objetivo desse estudo é analisar o potencial de dados orbitais multisensores para monitorar a produção agrícola nesse bioma.Editores: Douglas Francisco Marcolino Gherardi, Ieda Del´Arco Sanches, Luiz Eduardo Oliveira e Cruz de Aragão. Na publicação: Daniel Castro Victoria

Uso de dados multi-sensores para o monitoramento agrícola no cerrado: resultados preliminares.

O objetivo desse estudo é analisar o potencial de dados orbitais multisensores para monitorar a produção agrícola nesse bioma.Editores: Douglas Francisco Marcolino Gherardi, Ieda Del´Arco Sanches, Luiz Eduardo Oliveira e Cruz de Aragão. Na publicação: Daniel Castro Victoria

Mapping agricultural intensification in the Brazilian savanna: a machine learning approach using harmonized data from Landsat Sentinel-2.

Agricultural intensification practices have been adopted in the Brazilian savanna (Cerrado), mainly in the transition between Cerrado and the Amazon Forest, to increase productivity while reducing pressure for new land clearing. Due to the growing demand for more sustainable practices, more accurate information on geospatial monitoring is required. Remote sensing products and artificial intelligence models for pixel-by-pixel classification have great potential. Therefore, we developed a methodological framework with spectral indices (Normalized Difference Vegetation Index (NDVI), Normalized Difference Water Index (NDWI), and Soil-Adjusted Vegetation Index (SAVI)) derived from the Harmonized Landsat Sentinel-2 (HLS) and machine learning algorithms (Random Forest (RF), Artificial Neural Networks (ANNs), and Extreme Gradient Boosting (XGBoost)) to map agricultural intensification considering three hierarchical levels, i.e., temporary crops (level 1), the number of crop cycles (level 2), and the crop types from the second season in double-crop systems (level 3) in the 2021-2022 crop growing season in the municipality of Sorriso, Mato Grosso State, Brazil. All models were statistically similar, with an overall accuracy between 85 and 99%. The NDVI was the most suitable index for discriminating cultures at all hierarchical levels. The RF-NDVI combination mapped best at level 1, while at levels 2 and 3, the best model was XGBoost-NDVI. Our results indicate the great potential of combining HLS data and machine learning to provide accurate geospatial information for decision-makers in monitoring agricultural intensification, with an aim toward the sustainable development of agriculture